Expanding and upsetting tool.



PATENTBD MAR.v 24, 190s.

L. D. LOVEKIN.` EXPANDING AND UPSBTTING TOOL.

APPLICATION FILED MAR. 28, 1902.

2 SHEETS-SHEET 1.

N0 MODEL.

PATENTED MAB.. 24, 1903.

L. D. LOVEKIN.

FXPANDIITGrl AND UPSETTING TOOL.

APPLIOATION FILED MAR. 2s, 1902.

2 SHEETS-SHEET 2.

N0 MODEL.

LUTHER D. LovEKIN, oF PHILADELPHIA, PENNSYLVANIA, AssIGNoR E ONE-HALF ToJOHN PETER MATHIEU, on PHILADELPHIA, PENN- svLvANrA.

IEXPANDING AND UPSETTVING TOOL.

SPECIFICATIQN forming part of Letters Patent No. 723,289, dated March24, 1903.

Application led March 28,1902.

To all whom zit may @orticaria p Be it known that I, LUTHER DANIEL LovE-K1N, of the @ity and county of Philadelphia `the following specificationand shown inthe accompanying drawings, which form a part thereof.

own axes. `its follower-shaft are moved longitudinally The object ofmyinvention is to provide a simple and efficient tool capable of beingeasily and expeditiously handled for expandiing and upsetting tube endsor other tubular ieces within `perforated plates or apertures designedfor their reception.

In carrying out my invention Iprovide a suitable mandrel adapted to berotated in any convenient manner, the lower end of which is furnishedwith expandingrollers, which are preferably made tapered. Within themandrel I'arrange a follower which car.-` ries upon its lower end atapered roller adapted topress upon the expanding-rollers for thepurpose of causing them to describe in their travel a circular path ofgreater or less diameter, as the work may require, and also to I reducetheir resistance to rotation upon their The tapered follower-roller andI through the mandrel by handbperated means,

which may be manipulated while the expanding operation isbeing carriedonby the expanding-rollers. I Combinedwith the expanding devices .abovementioned I provide the mandrel 4with upsettingrollers, arranged `aboutits bodyand at a distance from the ex panding-rollers. `The rollers aregrooved, so as to upset and bead the edge of the tube to make a tightand finished joint-such, for example, as suitable fors'ecuringboiler-tubes I g within the head of the shell.

My invention further includes details of construction, which, togetherwith the features above mentioned, will be better understood byreference to the drawings, in which- Figure 1 is a sectional elevationof'my im- Serial No. 100,354. (No model.)

provedexpanding and upsetting tool. Fig.

2 is an end view of the same. Fig. 3 is a sectional elevation showing `amodification ofthe antifriction devices' for the followerroller. Fig. 4is a sectional elevation of a modified form of the lower portion of mytool. Fig. 5 is an elevation of the same. an end view of the same. Fig.7 is a crosssection on line 7 7 of Fig. 4. Fig. 8 is a sectionalelevation of the tube before being expanded and upset, and Fig. 9 is theltube after being expanded and upset.'

Fig. 6 is 2 is a mandrel which is substantially cy .l

lindrical in shape, having at the bottom a tubular part and at the top ashank bywhich it may be held and rotated. In the lower end of thetubular part of the mandrel I arrange the expandingrollers 3, preferablythree in number, which are set into sockets "5, formed with curvedwalls, whichV hold the rollers from falling out of the mandrel. Theseexpanding-rollers 3 are retained upon the mandrel by an annular plate 6,held` to the bottom of the mandrel by screws 4. The surfaces of theserollers are exposed upon the Y outside of the mandrel, so as to operateupon the work to be expanded, and are also exposed upon the inside ofthe mandrel, so as to be operated upon by the follower-roller 10,1ocated within the chamber 7 of the tubular part of the mandrel. Thisfollower-'roller 10 is tapered, with the smaller end downward, and actsupon the expanding-rollers 3 to press them apart, so that they are madeto describe circles of gradually-increasing diameters in the expandingoperation when desired. The rollers 3 are also preferably tapered, butin the reverse direction to the roller l0.' When the inner diameter ofthe work to be expanded is uniform, the tapers of the rollers 3 and l0are the same; but it would be different where the inner surface of thetubes or bushing or ter, as will be readily understood.

ring to be expanded is not of uniform diame The follower-roller l0isloosely sleeved u upon a spindle 9 of a follower-shaft 8 and heldthereon by a nut 12. When the roller `10 is retracted, it is inclosedwithin the chamber 7, and is thus protected when ont of'nse. I

The follower-roller is operated by the following devices: The middleportion ofthe mandrel is slotted, as at 13, and the upper portion of itsbody above the slot is screw-threaded at 14 and provided with a nut 17.A oontroller-ring 15, provided with suitable handles or parts for theoperator to grasp, is loosely sleeved over the mandrel-body andjournaled in bearings 18 011 the mandrel and 16 on the nut 17. In-thismanner the controller-ring may be freely rotated for purposes to be setout later on. The mandrelbody is bored through almost to the shank andis filled with the vertically-adjustable follower-shaft 8, having at itsupper end a transverse key 20, which is guided in the slots 13 of themandrel, so as to be prevented from turning, the-ends of said keyprojecting beyond the mandrel-body and connecting with thecontroller-ring by screw-threads upon its outer ends engaging internalthreads 19 on the interior face of the controller-ring. It will now beseen that by turning the controller-ring or holding it while the mandrelis rotated the follower-shaft will be caused to move longitudinallythrough the mandrel, and thereby impart a longitudinal movement to thefollower-roller 10, located on the spindle of the said follower-shaft.Any other suitable means may be employed for imparting a longitudinalmovement to the followerroller; but that shown I have found mostexcellently adapted to the purpose and equally effective whetherthemandrel is rotated or the work rotated or both rotated. While I haveshown the controller-ring as provided f with handles to turn it, anordinary handwheel may be used instead, if preferred.

As the roller 10is subjected to heavy strains in an upward directionwhen spreading the rollers 3 in expanding the tube or other work, I findit most advantageous to provide means to take this thrust with the leastpossible liability of Wear from friction. 'Io accomplish this, I providethe follower-shaft with several antifriction rings or collars 11,resting upon one another and between the end of the roller 10 and theshoulder upon the lower end of said shaft, said rings or collarsencircling the spindle 9. These rings or collars take up the end thrustof the roller and permit it to revolve freely under the action of therotating expanding-rollers While the roller 10 is carried upon thespindle 9, it need not fit the same tightly, as it is centered by thethree expanding-rollers 3, and is therefore preferably made with somesmall provision for lateral play upon its spindle, as shown.

At a distance above the expanding-rollers 3 I arrange three or moreupsetting and beading rollers 21, the same being carried upon radialaxes 22, one end of which is set into the body of the mandel and theother or outer end supported by brackets 23, secured to the mandrel byscrews or other convenient means. As shown, the mandrel-bodyis somewhatrecessed, as at 32, into which to let the side of the upsetting-rollers2l, so that lthe 'annular grooves of said rollers shall come inalinement with the edge of the tube being upset.

It will now be understood that if the mandrel be inserted within a tube28, Fig. 8, and revolved while depressing the follower andfollower-roller 10 the tube will be expanded within the circular hole oraperture in the plate or head 31,as shown at 29 in Fig.9. When this isdone, the vfollower-roller 10 is retracted and the mandrel insertedfarther into the tube until the upsetting-rollers 21 press upon the endof the tube. The action of the rollers 21 then upsets and beads the endof the tube, as shown at 30 in Fig. 9, thereby firmly securing the tubein the head 31 and making a steam-tight joint. The use of this tool isespecially advantageous in securing boilertubes in the heads of boilers.

The tool may be modified in the following particulars, if so desired: Inplace of the antifriction rings or collars 11 between the roller 10 andthe shoulder of the follower 8 I may employ antifriction-rollers orball-bearings, as shown at 24 in Fig. 3. The rollers 3 may be held inthe mandrel in the manner shown in Figs. 4, 5, and -namely, by havingtrunnions which lit into bearing-slots in the mandrel. In this case therollers 3 are put into position from the inside of the mandrel, andwhile prevented from falling outward, because of the trunnions andbearings in the mandrel, they cannot fall inward, because of the roller10. These figures also show a modified manner of carrying the upsetting?`and beading rollers 21.

In this case the roller-carrying brackets 23 are integral with a collar26, fitting the mandreland held by a shoulder against longitudinalmovement and also keyed to the mandrel at 27 to prevent turning thereon.The mandrel may have longitudinal slots or grooves 25 to permit thepassage of the inner end of the journals 22 of the upsetting-rollers, sothat these rollers may be attached to the collar 26 before the same isslipped up into place and carry with it the rollers 21. It willtherefore be understood that I do not limit myself to any particularmanner of attaching the rollers 2l or of supporting the rollers 3, andhence the details of construction may be varied without departing fromthe spirit of my invention. y l

Matters shown in this application and not claimed constitutesubject-matter of other pending applications of mine, more particularlySerial No. 100,351, of 1902, Serial No. 100,353, of 1902, and Serial No.100,355, of 1902.

Having now described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In a tool for expanding and upsetting pipe, the combination of amandrel having a tubular end, a series of expanding-rollers carried" bythe tubular end of the mandrel and movable to and from each other, acen- IOO IIO

Vagainst which the expanding-rollers rest and upon which they revolveWhen doing their work of expandingthe tube, a central support for thecentral roller for supporting it within the mandrel but out of contactwith its interior Walls, and one or more grooved upsetting-rollersjonrnaled upon horizontal i axes radiating from the mandrel at aconsiderable distance from its end so as to be out of transversealinement with the expandingrollers butmaintaining relatively fixedrelation to said rollers.

2. In a tool for expanding and upsetting pipe, the combination of amandrel having a tubular end and a shoulder at a distance from the endfaseries of expanding-rollers carried by the tubular end of the mandreland movable to and from each other, a central roller Within the tubularmandrel and against which the expanding-rollers rest and upon which theyrevolve when doing their Work-of expanding the tube, a central supportfor the `central roller for supporting it within the mandrel but out ofeontactwith its interior walls, one or more grooved upsetting-rollersjournaled upon horizontal axes radiating `from the mandrel atconsiderable distance from its end so as to be out of transversealinement with the expanding-rollers, anda ring fitting about themandrel adjacent to the shoulder and provided with brackets supportingthe outer ends of said upsetting-rollers.

3. In a tool for expanding tubes, the oombination, of a mandreladaptedto be held when usingthe tool, expanding-rollers carried by the mandreland adapted to project beyond the outer surface thereof, alongitudinally-adj ustablefollower carried by the mandrel having anannular shoulder, a tapered roller journaled upon the follower and movedthereby and adapted to receive the thrust of the expanding-rollers whenin the act of expanding the tube, antifriction-bearings between the endof the follower-roller and the shoulder of the follower, means to movethe follower longitudinally through the mandrel without rotating it,grooved upsetting-rollers rotating in vertical planes and upon axesradially arranged to the mandrel, and supporting means for theupsetting-rollers extending upward or away from the expandingrollers andsecured to the mandrel.

`t. In an expanding-tool, the combination of the mandrel havinga tubularend portion provided with sockets opening outward at the rim, taperedexpanding-rollers 3 carried in said sockets and of larger diameter thanthe outer openings of the sockets, an annular ring 6 secured to the endofthe mandrel to close the bottom of the socketsV and. to hold therollers in place, a tapered follower-roller 10 arranged within themandrel and adapted to spread the expanding-rollers 3, means for movingthe follower -roller longitudinally without rotating it, groovedupsetting-rollers 2l rotating in vertical planes, anddownwardly-extending brackets supporting the outer ends of said rollersand secured to the mandrel above them.

In testimony of which invention I have hereunto set my hand.

L. D. LOVEKIN;

Witnesses:

' R. M. HUNTER,

GEORGE H. EIMERT.

